Alert archive / Mississippi / Flash Flood Warnings in 1993

Flash Flood Warning 4, NWS Jackson, MS

January 20, 1993Forrest County, Lamar County, Mississippi

NWS Jackson, MS issued this flash flood warning at Jan 20, 1993, 9:21 AM CST for Forrest County, Lamar County, Mississippi. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Jan 20, 1993, 9:21 AM CST (15:21 UTC)
Expired: Jan 20, 1993, 12:30 PM CST
In force: 3 hr
Issued by: NWS Jackson, MS
Area: Whole counties

Counties Forrest County, MS, Lamar County, MS

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 3.4 hours before the alert went out and 110 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 21 J/kg
Mixed-layer CIN: -102 J/kg
Mixed-layer LCL: 545 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 392 m²/s²
0-3 km storm-relative helicity: 460 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KJAN 201526
FFWJAN
MSC035-073-201830-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE JACKSON MS
921 AM CST WED JAN 20 1993
 
THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 1230 PM CST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...S...
 
IN SOUTHEAST MISSISSIPPI
 
   ...FORREST COUNTY...LAMAR COUNTY
 
A FLASH FLOOD WARNING IS NOW IN EFFECT FOR LAMAR AND FORREST COUNTIES
OF SOUTHEAST MISSISSIPPI.
 
THE EMERGENCY MANAGEMENT FOR FORREST AND LAMAR COUNTIES REPORTS THAT
NUMEROUS ROADS AND STREETS IN THE CITY OF HATTIESBURG ARE FLOODED.
ALSO...RECENT HEAVY RAINS HAVE SENT MANY CREEKS ABOVE BANKFUL IN
OTHER PORTIONS OF FORREST AND LAMAR COUNTIES AND HAVE RESULTED IN
FLOODING OF OTHER HIGHWAYS.
 
RADAR INDICATES THAT LIGHT TO MODERATE RAIN STILL EXISTS OVER
THESE AREAS...AND MORE LOCALLY HEAVY RAIN IS LIKELY LATER THIS
MORNING AND THIS AFTERNOON.
 
 
A FLASH FLOOD WARNING MEANS THA0T FLOODING IS OCCURRING OR IS
IMMINENT.  DO NOT STAY IN AREAS SUBJECT TO FLASH FLOODING WHEN
WATER BEGINS RISING.  MOVE TO HIGHER GROUND.
<
 
 
 
&

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jan 20, 3:29 AM CST, 5 hours 52 minutes before

MSZ003-008-009-010-011-012-013-014-201230-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
328 AM CST WED JAN 20 1993

...HEAVY RAINFALL AND A FEW STRONG THUNDERSTORMS OVER SOUTHERN
MISSISSIPPI...

AT 325 AM CST...A LARGE AREA OF RAIN REMAINED OVER CENTRAL AND SOUTHERN
MISSISSIPPI.  RADAR AND LIGHTNING DETECTION EQUIPMENT INDICATED A FEW
EMBEDDED THUNDERSTORMS OVER THE SOUTHERN THIRD OF MISSISSIPPI.  OTHER
INTENSE THUNDERSTORMS...PRODUCING VERY HEAVY RAINFALL...WERE NOTED OVER
SOUTHEASTERN LOUISIANA JUST SOUTH OF THE LOUISIANA-MISSISSIPPI STATE
LINE.  ONE STRONG THUNDERSTORM WAS MOVING EASTWARD INTO PEARL RIVER
COUNTY.

RAINFALL AMOUNTS SO FAR TONIGHT HAVE LIKELY BEEN ON THE ORDER OF 1 TO 2
INCHES IN A 75-MILE WIDE BAND BETWEEN NATCHEZ AND HATTIESBURG.
WATER IS MOST LIKELY POOLING IN LOW-LYING AREAS OVER PARTS OF SOUTHERN
MISSISSIPPI DUE TO SATURATED GROUNDS.

CONDITIONS COULD GET WORSE THROUGH THE REMAINDER OF TTHE PREDAWN
HOURS...DURING THE DAY WEDNESDAY...AND WEDNESDAY NIGHT.  MORE HEAVY
RAINFALL AND A FEW SEVERE THUNDERSTORMS ARE POSSIBLE OVER THE NEXT 24
HOURS.

The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 20, 4:05 PM CST	Flash Flood Warning	JAN	Marion, Walthall	3 hr
Jan 20, 4:05 PM CST	Flash Flood Warning	JAN	Lamar	3 hr
Jan 20, 4:24 PM CST	Flash Flood Warning	JAN	Wilkinson	6 hr
Jan 20, 4:31 PM CST	Flash Flood Warning	JAN	Amite, Pike	6 hr
Jan 20, 4:51 PM CST	Flash Flood Warning	JAN	Forrest	6 hr

Nearby

Flash Flood Warnings in Mississippi, 1993 Every flash flood warning in 1993

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.